stealc | deba2be10d757679996d33d70d37b968088ba37e1d0f86d71beb8be38c34262f

Resubmissions

02/09/2023, 14:51

230902-r8cxhaea23 10

02/09/2023, 14:49

230902-r65vhadf3s 10

Analysis

max time kernel
128s
max time network
137s
platform
windows10-1703_x64
resource
win10-20230831-en
resource tags

arch:x64arch:x86image:win10-20230831-enlocale:en-usos:windows10-1703-x64system
submitted
02/09/2023, 14:49

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General

Target

Grammarly Promotional Launcher.exe
Size

20.4MB
MD5

9ed667ef1d116c0cb1051b8001b6ea0f
SHA1

cbe4fdb8847ff9b5d0aa1e0a43bb3abd28f4a875
SHA256

deba2be10d757679996d33d70d37b968088ba37e1d0f86d71beb8be38c34262f
SHA512

4fc726f8f2ca7f024f5db1a660a3c9dff109014cc2f56097470b317950d05956c084f2e19fb9da3d14d589444c2bb0a7a370bce8b5dc049b5d3e774994bdd4e1
SSDEEP

393216:onRZwqeWLCKhc+0Uz+JD8rY5Pobe7n/k8MoeTtqLiVc4GYbJQp:CN1hxX+QrY5PAe7/kHtsii4bbJG

Score

10^/10

stealc 9323114451583182971321730716 spyware stealer

Malware Config

Extracted

Family

stealc

Botnet

9323114451583182971321730716

http://89.23.108.122

Attributes

url_path
/e510c4e87f874d68.php

rc4.plain

Signatures

Stealc
Stealc is an infostealer written in C++.
stealer stealc
Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
3920	MSBuild.exe
3920	MSBuild.exe

Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials In Files
T1552.001

Enumerates connected drives 3 TTPs 1 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\F:	Grammarly Promotional Launcher.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4732 set thread context of 3920	4732	Grammarly Promotional Launcher.exe	73

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	MSBuild.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	MSBuild.exe

Suspicious behavior: EnumeratesProcesses 17 IoCs

pid	Process
4732	Grammarly Promotional Launcher.exe
4732	Grammarly Promotional Launcher.exe
4732	Grammarly Promotional Launcher.exe
4732	Grammarly Promotional Launcher.exe
4732	Grammarly Promotional Launcher.exe
4732	Grammarly Promotional Launcher.exe
4732	Grammarly Promotional Launcher.exe
4732	Grammarly Promotional Launcher.exe
4732	Grammarly Promotional Launcher.exe
4732	Grammarly Promotional Launcher.exe
4732	Grammarly Promotional Launcher.exe
4732	Grammarly Promotional Launcher.exe
3016	powershell.exe
3016	powershell.exe
3016	powershell.exe
3920	MSBuild.exe
3920	MSBuild.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3016	powershell.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 4732 wrote to memory of 3016	4732	Grammarly Promotional Launcher.exe	70
PID 4732 wrote to memory of 3016	4732	Grammarly Promotional Launcher.exe	70
PID 4732 wrote to memory of 4816	4732	Grammarly Promotional Launcher.exe	72
PID 4732 wrote to memory of 4816	4732	Grammarly Promotional Launcher.exe	72
PID 4732 wrote to memory of 4816	4732	Grammarly Promotional Launcher.exe	72
PID 4732 wrote to memory of 3920	4732	Grammarly Promotional Launcher.exe	73
PID 4732 wrote to memory of 3920	4732	Grammarly Promotional Launcher.exe	73
PID 4732 wrote to memory of 3920	4732	Grammarly Promotional Launcher.exe	73
PID 4732 wrote to memory of 3920	4732	Grammarly Promotional Launcher.exe	73
PID 4732 wrote to memory of 3920	4732	Grammarly Promotional Launcher.exe	73
PID 4732 wrote to memory of 3920	4732	Grammarly Promotional Launcher.exe	73
PID 4732 wrote to memory of 3920	4732	Grammarly Promotional Launcher.exe	73
PID 4732 wrote to memory of 3920	4732	Grammarly Promotional Launcher.exe	73
PID 4732 wrote to memory of 3920	4732	Grammarly Promotional Launcher.exe	73

C:\Users\Admin\AppData\Local\Temp\Grammarly Promotional Launcher.exe
"C:\Users\Admin\AppData\Local\Temp\Grammarly Promotional Launcher.exe"
1⤵
- Enumerates connected drives
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4732
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -NoProfile -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBzACAAMQAwAA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3016
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
  2⤵
  PID:4816
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
  2⤵
  - Loads dropped DLL
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:3920

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_3vfsdfd3.nj5.ps1

Filesize
1B

MD5
c4ca4238a0b923820dcc509a6f75849b

SHA1
356a192b7913b04c54574d18c28d46e6395428ab

SHA256
6b86b273ff34fce19d6b804eff5a3f5747ada4eaa22f1d49c01e52ddb7875b4b

SHA512
4dff4ea340f0a823f15d3f4f01ab62eae0e5da579ccb851f8db9dfe84c58b2b37b89903a740e1ee172da793a6e79d560e5f7f9bd058a12a280433ed6fa46510a

Download Submit
\ProgramData\mozglue.dll

Filesize
593KB

MD5
c8fd9be83bc728cc04beffafc2907fe9

SHA1
95ab9f701e0024cedfbd312bcfe4e726744c4f2e

SHA256
ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

SHA512
fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

Download Submit
\ProgramData\nss3.dll

Filesize
2.0MB

MD5
1cc453cdf74f31e4d913ff9c10acdde2

SHA1
6e85eae544d6e965f15fa5c39700fa7202f3aafe

SHA256
ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

SHA512
dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

Download Submit
memory/3016-47-0x000002B360370000-0x000002B360380000-memory.dmp

Filesize
64KB

Download
memory/3016-46-0x00007FFD28180000-0x00007FFD28B6C000-memory.dmp

Filesize
9.9MB

Download
memory/3016-25-0x000002B360380000-0x000002B3603A2000-memory.dmp

Filesize
136KB

Download
memory/3016-27-0x000002B360370000-0x000002B360380000-memory.dmp

Filesize
64KB

Download
memory/3016-28-0x000002B360370000-0x000002B360380000-memory.dmp

Filesize
64KB

Download
memory/3016-31-0x000002B360530000-0x000002B3605A6000-memory.dmp

Filesize
472KB

Download
memory/3016-53-0x00007FFD28180000-0x00007FFD28B6C000-memory.dmp

Filesize
9.9MB

Download
memory/3016-49-0x000002B360370000-0x000002B360380000-memory.dmp

Filesize
64KB

Download
memory/3016-48-0x000002B360370000-0x000002B360380000-memory.dmp

Filesize
64KB

Download
memory/3016-26-0x00007FFD28180000-0x00007FFD28B6C000-memory.dmp

Filesize
9.9MB

Download
memory/3920-115-0x0000000000400000-0x000000000062D000-memory.dmp

Filesize
2.2MB

Download
memory/3920-116-0x0000000000400000-0x000000000062D000-memory.dmp

Filesize
2.2MB

Download
memory/3920-54-0x0000000000400000-0x000000000062D000-memory.dmp

Filesize
2.2MB

Download
memory/3920-57-0x0000000000400000-0x000000000062D000-memory.dmp

Filesize
2.2MB

Download
memory/3920-58-0x0000000000400000-0x000000000062D000-memory.dmp

Filesize
2.2MB

Download
memory/3920-60-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/4732-9-0x00007FFD44B40000-0x00007FFD44B42000-memory.dmp

Filesize
8KB

Download
memory/4732-1-0x0000000140000000-0x0000000141469000-memory.dmp

Filesize
20.4MB

Download
memory/4732-19-0x0000000140000000-0x0000000141469000-memory.dmp

Filesize
20.4MB

Download
memory/4732-18-0x00007FFD44BD0000-0x00007FFD44BD2000-memory.dmp

Filesize
8KB

Download
memory/4732-17-0x00007FFD44BC0000-0x00007FFD44BC2000-memory.dmp

Filesize
8KB

Download
memory/4732-16-0x00007FFD44BB0000-0x00007FFD44BB2000-memory.dmp

Filesize
8KB

Download
memory/4732-14-0x00007FFD44B90000-0x00007FFD44B92000-memory.dmp

Filesize
8KB

Download
memory/4732-15-0x00007FFD44BA0000-0x00007FFD44BA2000-memory.dmp

Filesize
8KB

Download
memory/4732-12-0x00007FFD44B70000-0x00007FFD44B72000-memory.dmp

Filesize
8KB

Download
memory/4732-13-0x00007FFD44B80000-0x00007FFD44B82000-memory.dmp

Filesize
8KB

Download
memory/4732-11-0x00007FFD44B60000-0x00007FFD44B62000-memory.dmp

Filesize
8KB

Download
memory/4732-20-0x0000000140000000-0x0000000141469000-memory.dmp

Filesize
20.4MB

Download
memory/4732-10-0x00007FFD44B50000-0x00007FFD44B52000-memory.dmp

Filesize
8KB

Download
memory/4732-7-0x00007FFD44B20000-0x00007FFD44B22000-memory.dmp

Filesize
8KB

Download
memory/4732-8-0x00007FFD44B30000-0x00007FFD44B32000-memory.dmp

Filesize
8KB

Download
memory/4732-6-0x00007FFD44B10000-0x00007FFD44B12000-memory.dmp

Filesize
8KB

Download
memory/4732-59-0x0000000140000000-0x0000000141469000-memory.dmp

Filesize
20.4MB

Download
memory/4732-5-0x00007FFD44B00000-0x00007FFD44B02000-memory.dmp

Filesize
8KB

Download
memory/4732-4-0x00007FFD44AF0000-0x00007FFD44AF2000-memory.dmp

Filesize
8KB

Download
memory/4732-3-0x00007FFD44AE0000-0x00007FFD44AE2000-memory.dmp

Filesize
8KB

Download
memory/4732-2-0x00007FFD44AD0000-0x00007FFD44AD2000-memory.dmp

Filesize
8KB

Download
memory/4732-0-0x00007FFD44AC0000-0x00007FFD44AC2000-memory.dmp

Filesize
8KB

Download